HomeFlange gasket fits class 150 flange, neoprene black. Standard drop ring type.Flange Gasket - 4" - Fits Class 150 Flange - Neoprene - Black - NG40SKU: NG40$1.76PriceQuantityAdd to CartFeatures & Benefits Flange gasket fits class 150 flange Neoprene black Standard drop ring type.